<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width" />
		<title></title>
		<link rel="stylesheet" type="text/css" href="css/index.css" />
		<script src="js/game.js"></script>
		<script src="js/myPlane.js"></script>
		<script src="js/dom.js"></script>
		<script src="js/zidan.js"></script>
		<script src="js/makePlane.js"></script>
		<script src="js/smallPlane.js"></script>
		<script src="js/middlePlane.js"></script>
		<script src="js/largePlane.js"></script>
	</head>

	<body>
		<div class="main">
			<div class="logo"></div>
			<ul id="options">
				<li value="4">困难</li>
				<li value="3">一般</li>
				<li value="2">简单</li>
				<li value="1">非常简单</li>
			</ul>
		</div>
	</body>
	<script type="text/javascript">
		var options = document.querySelectorAll("#options > li")

		for(var i = 0; i < options.length; i++) {
			options[i].addEventListener("click", function(e) {
				new Game(this.value).start()
			})
		}
	</script>

</html>